> Our Hosting provider, Hetzner, has recently started charging for public IPv4 addresses - as they should! Those numbers started getting expensive. This prompted me to try and set up a new server cluster using IPv6 exclusively...
I think what OP went thru is what will make the transition happen. Market forces are ultimately going to be the thing that drives wider adoption: IPv4 addresses getting so expensive that it drives people to try IPv6, and when that fails they complain in posts like this and directly to their service providers. The fact that OP names names of services failing to offer IPv6 is a good thing. Ideally it will start creating pressure on those services/corporations to fully support IPv6. If complaining doesn't work to motivate them, users moving away from their services to providers who do offer IPv6 support will motivate them.
I think what OP went thru is what will make the transition happen. Market forces are ultimately going to be the thing that drives wider adoption: IPv4 addresses getting so expensive that it drives people to try IPv6, and when that fails they complain in posts like this and directly to their service providers. The fact that OP names names of services failing to offer IPv6 is a good thing. Ideally it will start creating pressure on those services/corporations to fully support IPv6. If complaining doesn't work to motivate them, users moving away from their services to providers who do offer IPv6 support will motivate them.